|Quadrangle map, 1:250,000-scale||CA|
|Quadrangle map, 1:63,360-scale||B-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 1,750 feet, 0.2 miles southeast of point 1453 on Weather Ridge. The site is in section 18, T. 1 N., R. 13 W., of the Kateel River Meridian. Cobb, 1972 (MF-389), location 9, and Miller and Elliott (1969), figure 2, sample location 22.|
Geologic descriptionThis occurrence consists of a galena-bearing calcite vein 1 foot thick that cuts Jurassic-Cretaceous altered andesitic volcanic rocks near the contact with quartz monzonite of the Late Cretaceous Quartz Creek pluton. The alteration is marked by quartz-carbonate replacement, and tourmaline (also see Additional comments). A grab sample of the vein contained: 20 ppm Ag, 200 ppm Cu, 1.5% Pb, and 700 ppm Zn (Miller and Elliott, 1969).
|Geologic map unit||(-161.442644120633, 65.4893250830396)|
|Mineral deposit model||Sulfides in altered quartz monzonite.|
|Age of mineralization||Late Cretaceous.|
|Alteration of deposit||Quartz-carbonate replacement and tourmaline.|
|Workings or exploration||The area has been mapped and examined by the U.S. Geological Survey and by various exploration companies.|
|Indication of production||None|
Additional commentsThis site is one of numerous occurrences of argentiferous galena, sphalerite, pyrite and arsenopyrite in an 18-mile-long, 2- to 5-mile-wide zone of altered andesite surrounding the Quartz Creek quartz monzonite pluton. The altered zone trends N 15 W, across the drainage basins of Quartz Creek and the Kiwalik River, parallel to prominent lineaments in the area.
Cobb, E.H., 1972, Metallic mineral resources map of the Candle Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-389, 1 sheet, scale 1:250,000.
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Candle, Holy Cross, Norton Bay, Nulato, and Unalakleet quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-866, 102 p.
|Reporters||Anita Williams (Anchorage, AK)|
|Last report date||1/12/2000|